Foamed composite material and production thereof

Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component

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Details

428315, 428327, B32B 518, B32B 522, B32B 532

Patent

active

042620520

ABSTRACT:
The present invention relates to a foamed composite material serviceable for light weight constructional material or thermal insulating material having a high mechanical strength, particularly, high tensil strength. The foamed composite material is made by lining a surface of specific plastic foam with a lining material comprising an unsaturated polyester and vinyl monomer. The specific plastic foam is obtained by expanding thermoplastic resin particles consisting of polyolefin, vinyl aromatic polymer and graft polymer formed by graft-polymerization of vinyl aromatic monomer onto the polyolefin or otherwise, which may be produced by polymerizing a vinyl aromatic monomer impregnated into particles of polyolefin to graft the monomer onto the backbone of polyolefin. The vinyl monomer contained in the lining material penetrates into the plastic foam and hardens to bind strongly the lining layer and the plastic foam. The coated plastic foam of the present invention is useful to material for vessel, float, tank, building and the like.

REFERENCES:
patent: 3256133 (1966-06-01), Wright et al.
patent: 3391823 (1968-07-01), Tijms
patent: 3743611 (1973-07-01), Muroi et al.
patent: 3900640 (1975-08-01), Vecchiotti
patent: 3959189 (1976-05-01), Kitamori
patent: 4168353 (1979-09-01), Kitamori

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